Strongly Gapped Spin-Wave Excitation in the Insulating Phase of NaOsO3

Abstract

NaOsO3 hosts a rare manifestation of a metal-insulator transition driven by magnetic correlations, placing the magnetic exchange interactions in a central role. We use resonant inelastic x-ray scattering to directly probe these magnetic exchange interactions. A dispersive and strongly gapped (58 meV) excitation is observed indicating appreciable spin-orbit coupling in this 5d3 system. The excitation is well described within a minimal model Hamiltonian with strong anisotropy and Heisenberg exchange (J1=J2=13.9 meV). The observed behavior places NaOsO3 on the boundary between localized and itinerant magnetism.

References in corpus (15)

• Correlated quantum phenomena in the strong spin-orbit regime
• Linear spin wave theory for single-Q incommensurate magnetic structures
• Isospin Dynamics in Sr2IrO4 : Forging Links to Cuprate Superconductivity
• Magnetically driven metal-insulator transition in NaOsO3
• Continuous metal-insulator transition of the antiferromagnetic perovskite NaOsO3
• Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2Os2O7
• The frustrated FCC antiferromagnet Ba2YOsO6: structural characterization, magnetic properties and neutron scattering studies
• Emergent excitation at the magnetic metal-insulator transition in the pyrochlore osmate Cd2Os2O7
• Resonant X-ray scattering and the $j_{\mathrm{eff}}=1/2$ electronic ground state in iridate perovskites
• Giant spin-phonon-electronic coupling in a 5d oxide
• Electronic structure and magnetic properties of NaOsO${}_3$
• Spin-orbit coupling controlled ground state in Sr${}_2$ScOsO${}_6$
• Lifshitz transition driven by spin fluctuations and spin-orbit renormalization in NaOsO${}_3$
• Structural and Correlation Effects in the Itinerant Insulating Antiferromagnetic Perovskite NaOsO3
• Infrared evidence of a Slater metal-insulator transition in NaOsO3

Cited by in corpus (15)

• Spin-orbit coupling controlled $J=3/2$ electronic ground state in 5$d^3$ oxides
• Origin of magnetic excitation gap in double perovskite Sr${}_2$FeOsO${}_6$
• Evolution of the magnetic excitations in NaOsO${}_3$ through its metal-insulator transition
• Osmates on the verge of a Hund's-Mott transition: The different fates of NaOsO${}_3$ and LiOsO${}_3$
• Magnetic excitations in a three-orbital model for the strongly spin-orbit coupled iridates: Effect of mixing between the J=1/2 and 3/2 sectors
• Crossover from itinerant to localized magnetic excitations through the metal-insulator transition in NaOsO${}_{\text{3}}$
• Direct observation of electron density reconstruction at the metal-insulator transition in NaOsO3
• Effects of the structural distortion on the electronic band structure of {\boldmath $\mathrm{NaOs}{\mathrm{O}}_3$} studied within density functional theory and a three-orbital model
• Doping-induced insulator-metal transition in the Lifshitz magnetic insulator NaOsO3
• Possible origin of the absence of magnetic order in LiOsO${}_3$: Spin-orbit coupling controlled ground state
• Neutron Scattering Investigation of Rhenium Orbital Ordering in $3d-5d$ Double Perovskite Ca${}_2$FeReO${}_6$
• On the connection between magnetic interactions and the spin-wave gap of the insulating phase of NaOsO${}_3$
• Spin-orbit coupling induced magnetic anisotropy and large spin wave gap in $\mathrm{NaOs}{\mathrm{O}}_3$
• Coupled spin-orbital fluctuations in a three orbital model for $4d$ and $5d$ oxides with electron fillings $n=3,4,5$ -- Application to $\mathrm{NaOs}{\mathrm{O}}_3$, $\mathrm{C}{\mathrm{a}}_2\mathrm{Ru}{\mathrm{O}}_4$, and $\mathrm{S}{\mathrm{r}}_2\mathrm{Ir}{\mathrm{O}}_4$
• Altermagnetism and Weak Magnetism in the Insulating Distorted Perovskite Antiferromagnet NaOsO${}_3$